@Test
public void testFindFirstAboveThresholdPublicKey() throws GeneralSecurityException {
IEncryptionManager encryptionManager = new EncryptionManager();
PublicKey publicKey1 = encryptionManager.generateKeyPair().getPublic();
PublicKey publicKey2 = encryptionManager.generateKeyPair().getPublic();
List<PublicKey> publicKeys = new ArrayList<PublicKey>();
publicKeys.add(publicKey1);
publicKeys.add(publicKey1);
publicKeys.add(publicKey1);
publicKeys.add(publicKey2);
PublicKey result = new ThresholdChooser<PublicKey>().findFirstAboveThreshold(publicKeys, 3);
assertEquals(publicKey1, result);
}
/**
* @param encryptionManager IEncryptionManager used to construct a SecretKey object.
* @param privateProfileDocument PrivateProfileDocument containing given friend's SecretKey.
* @param friendName Friend whose SecretKey is to be found.
* @return A SecretKey object if one is found for the given friend's name, null otherwise.
* @throws GeneralSecurityException
*/
public static SecretKey findSecretKey(
IEncryptionManager encryptionManager,
PrivateProfileDocument privateProfileDocument,
String friendName)
throws GeneralSecurityException {
int indexOfKey = findIndexOfFriendPublicProfileKey(privateProfileDocument, friendName);
if (indexOfKey >= 0) {
FriendKeyMapping[] friendKeys =
privateProfileDocument.getPrivateProfile().getFriendKeyList().getFriendKeyArray();
byte[] keyBytes = friendKeys[indexOfKey].getSharedProfileKey().getKeyByteArray();
return encryptionManager.generateSecretKey(keyBytes);
} else {
return null;
}
}